Watson, do you think you could bring your friend, Mr Sherlock Holmes, down to see me?

My position at the Foreign Office seemed safe until this horrible disaster. I fear my career is ruined! War becomes a real threat after a top-secret document is stolen from the Foreign Office. But why has the thief waited ten weeks to sell the treaty? Holmes and Watson are plunged into a world of international diplomacy only to find that danger can come from unexpected quarters.